cho day 2004 , 2005 , 2007 , 2008 , 2010 , ....
tinh nhanh tong 20 so hang dau tien neu quy luat
viet ca bai giai ra gium minh
minh dang can gap
Viet tiep ba so thich hop vao choo cham cua moi day so :
a) 10 ; 12 ; 14 ; 16 ; ..................... ; 24.
b) 10 ; 13 ; 16 ; 19 ; ...................... ; 28
c) 1 ; 2 ; 3 ; 5 ; 8 ; ...........................; 55.
d) 1 ; 4 ; 9 ; 16 ; 25 ; ....................... ; 81
e) 1 ; 2 ; 4 ; 8 ; 16.
g) 2 ; 6 ; 12 ; 20 ; 30
Cac day so tren, tung day so deu phai neu quy luat.
ban An viet day so 12358314.......biet day so co quy luat la so thu 3 bang chu so cuoi cua tong 2 so tuoc.hoi day so do co so 2005 khong
4+1=5
2+5=12
3+6=21
8+11=?
tim quy luat va dien so thich hop vao dau hoi
Cau 1: luc 8h 1 nguoi di xe dap tu A->B, cach A 10 km. Biet rang nguoi do den B luc 10h 30phut. Tinh van toc cua nguoi di xe dap.
Cau 2: Chu vi cua hinh chu nhat la 18cm. neu giam chieu dai di 20% va tang chieu rong 25% thi P khong thay doi. tinh S hinh chu nhat do.
Cau 3: nguoi thu nhat di tu A->B van toc 30km/h. 20 phut sau, nguoi thu hai cung di tu A->B van toc 36km/h. Nguoi thu 2 den B sau nguoi thu nhat 5 phut. Hoi quang duong A->B dai bao nhieu?
Cau 4: ti so cua 2 so la 7/12. neu them 10 don vi vao so thu 1 thi ti so cua 2 so la 3/4. Tinh tong 2 so.
mik danh bang may tinh nen ko viet duoc dau. sorry nha. cam on nhieu!!!
1 ,Tim so co 4 chu so biet chu so hang tram gap doi chu so hang chuc , chu so hang chua gap 3 lan chu so hang don vi
2, Tim 1 so co 2 chu so , biet neu so do chia cho chu so hang don vi cua no thi dc thuong = 6 va du 5
3,Tim so co 4 chu so biet neu xoa chu so hang chuc thi so do giam di 1188 don vi
4, Tim so co 3 chu so neu so do cong voi tong cac chu so cua no thi = 555
Giai Han Ra Nhe !
.
ba bao gao dung tat ca 240 kg neu bot bao 1 di 30 kg thi bao 1 se it hon tong bao 2 va bao 3 la 134kg neu lay di 1/6 so gao o bao 2 va 2/5 so gao bao 3 thi so gao con lai cua hai bao nay bang nhau tinh so gao moi bao
1.tim so bi chia trong phep chia cho 12 co thuong la 35 va so du la so le co 2chu so
2.hieu cua so lon nhat co 4 chu so khac nhau va so nho nhat co 4 chu sola bao nhieu
3.mot hinh chu nhat co chieu dai gap ruoi chieu rong. Neu moi chieu tang them 1m thi duoc hinh chu nhat moi co dien tich tang them 26m2. Tinh chu vi hinh chu nhat
4.trung binh cong cua 2 phan so bang 5/12. Phan so thu nhat hon phan so thu hai 1/6. Tim phan so thu nhat
5.tim y biet (5/7 - y) nhan 4/5 =7/10 + 1/2
6.hieu 2 so =1/3 so be.Tong 2 so la 63. Tim so be
1. Tim 2 so co tong = 129. Neu lay so thu 1 chia cho so thu 2 thi duoc thuong la 6 du 3.
2. Tim 2 so co hieu = 114. Neu xoa chu so o hang don vi cua so lon thi duoc so be